BEFORE THE BELL-CF shares tumble after Agrium's final offer

NEW YORK, Nov 5 (Reuters) - Shares of CF Industries (CF.N) fell in premarket trading on Thursday after Agrium Inc (AGU.TO) made a final offer for the company of $45.00 per share in cash plus one Agrium share. For details, see [nWNAB0821]

The stock fell 6.8 percent to $80.14.

(Reporting by Angela Moon, Editing by)